Adds @deprecated and @experimental annotations (#142)

.github/workflows/build.yml

@@ -1,17 +1,22 @@
-name: "Build and run tests"
-on: [push, pull_request]
+name: "Build and Run Tests"
+on:
+  push:
+    branches: [main]
+  pull_request:
 
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ 8, 9, 10, 11 ]
+        java: [8, 11, 17]
     steps:
       - uses: actions/checkout@v2
       - name: Use Java ${{ matrix.java }}
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v3
         with:
+          distribution: 'corretto'
           java-version: ${{ matrix.java }}
-      - name: Build and test
+          cache: gradle
+      - name: Build and Test
         run: ./gradlew build

README.md

@@ -83,7 +83,7 @@ To obtain the `pig` executable:
 - Execute `./gradlew assemble`
 
 After the build completes, the `pig` executable and dependencies will be located
-in `pig/build/distributions/pig/pig-x.y.z.[tar.gz|zip]`.
+in `./pig/build/install/pig/bin/pig`.
 
 **Finally, make sure that the version of the `partiql-ir-generator-runtime` library that you are using corresponds to
 the version of the executable.**

pig-runtime/src/main/kotlin/org/partiql/pig/runtime/Experimental.kt

@@ -0,0 +1,7 @@
+package org.partiql.pig.runtime
+
+@RequiresOptIn(
+    message = "This DomainNode is marked as experimental",
+    level = RequiresOptIn.Level.WARNING
+)
+annotation class Experimental